//Pop from stack. Gives back the current element (the one on top)
public T Pop()
{
//Stack empty
if (curr == null)
{
throw new NullReferenceException();
}
T temp = curr.Value;
curr = curr.Pre;
return(temp);
}
//Push on stack. Adds the Parameter 'obj' on top of the stack
public void Push(T obj)
{
//New element is the first element in stack -> has no successor
if (curr == null)
{
curr = new StackElement <T>()
{
Value = obj, Pre = null
};
}
//Sets the new element to a temporary StackElement (newObj) with the current element as previous element
else
{
StackElement <T> newObj = new StackElement <T>()
{
Value = obj, Pre = curr
};
curr = newObj;
}
}